Strawberry is so disgusting, vile, morally reprehensible, evil and twisted that it grants a huge bonus to any damaging spells with which it is enchanted. In fact, the strawberry ice cream is more likely to be a strawberry ice cream of Destruction, Mass!
And somehow I don't see the pistachio ice cream of mass heal. It might be worth a Mass Cure Serious wounds though, but I've always had a soft spot for vanilla. OK, for vanilla based ice creams like chocolate chip, honeycomb, toffee and pistachip (IIRC). OK, so yes, pistachio does work.